Average & median calculator
Get a quick numerical summary without opening a spreadsheet. Paste numbers separated by spaces, commas, semicolons, or line breaks.
Average & median calculator
Runs on your deviceMean and median answer different questions
The arithmetic mean is the sum divided by the number of values. The median is the middle value after sorting; with an even count, it is the mean of the two middle values. For 2, 3, and 10, the mean is 5 and the median is 3. The large value pulls the mean upward while the median remains the middle observation.
Use consistent units and complete values
A list should describe comparable quantities in the same units. Combining metres and centimetres without converting first produces a meaningless summary. Each token must be a valid number. Blank separators are ignored, but invalid words are reported. A comma is always a separator here, so enter one thousand as 1000 and a decimal as 1.5, not 1,000 or 1,5.
A summary cannot explain a dataset
The range is maximum minus minimum. It tells you the full spread, but it does not show clustering, missing data, repeated observations, or why an outlier occurred. This tool does not weight values or choose whether any point should be removed. Keep the original data and use a chart or a more complete analysis for decisions. Browser floating-point arithmetic can introduce small rounding differences, especially for long decimal lists.
Worked examples
| Numbers | Mean | Median / range |
|---|---|---|
| 2, 3, 10 | 5 | 3 / 8 |
| 1, 2, 3, 4 | 2.5 | 2.5 / 3 |
Good questions.
Are commas decimal marks?
No. Commas separate numbers. Use a point for decimals and no thousands separators.
Does it ignore a word in the list?
No. Invalid tokens produce an error so missing data is not silently hidden.
Is this a weighted average?
No. Every entered value has equal weight. Use the weighted grade tool for percentage-weighted components.
Updated 5 November 2026 · Methods & corrections